Skip Star

Well...
Day one was pretty uneventful. We did do the trans filter and fluid, oil and filter, serpentine belt, air filter, and iridium plugs. So not a complete loss. BUT, the cats I ordered "for the Lexus SC400" were really just universal cats. The pre-cats are smaller and will bolt on so I will look for those. And the Flowmasters they sent me weren't offset right. The output pipe was centered. But we did get to drink a few beers and ponder the possibilities while looking at it. My friend wants to run true duals, just 2" pipe from the pre-cats to quieter muffs. I think I'll let him try it since I'm not paying. I still like the x-pipe idea but found many articles online about why you should use straight through mufflers, not baffled mufflers like Flowmasters, with an x-pipe. For sound of course. I think the car is plenty fast stock.
So I'm off to hunt for the correct pre-cats and research exhaust more.

Dougspeed

iTrader: (2)

So what would be your proposed alternative to the X pipe, retaining the stock Y pipe or running a true dual?

mitsuguy

iTrader: (2)

I am curious as well...

every V style motor I've ever worked with that wasn't turbocharged has benefitted from a H or X pipe versus true duals from each bank all the way back...

The stock solution is really just a big, restrictive X pipe... both banks combine into one, then they split back up - that's all an X pipe does... in theory for the best HP potential, each bank should have it's own exhaust, and to balance exhaust pulses, an X-pipe or H-pipe should be utilized...

sc30015

i have 2.5" flowmaster 40 series sport on my 93 sc300 and it sounds AMAZING. i havent done anything else to my exhaust tho